Discuss Wiring sensors in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

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nabba

Hi, I'm wiring lights about 20 via trunking in singles to loop in boxes , because the room is large I will need to position at least 2 or 3 sensors so either one will bring lights on ... Any advice on the wiring them pls ? I realise first off , live neutral earth to supply the sensor what do I take to the other one to incorporate it then obviously switch wire to lights its just the sensors im itchin my head at ... been that long time since did this sure it's simple just need direction
Thanks ...
 

Rob

Control System Engineer
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I'm presuming by sensors you mean PIR's? If so just wire them in parallel with each other.
 
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N

nabba

Hi , thanks for getting back. Yes pir's this is the thing parellel ?? so live neutral earth from the board into first pir then would it be live neutral earth to the next one and a switch wire so that either pir switches they will all come on is this right ...? Parellel always confuses me in lighting
Thanks again .
 

Rob

Control System Engineer
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Yes, line, neutral, earth and a switch live need to be taken between each pir.

What type of light fittings are you switching, make sure the PIRs can switch the required load.
 

sparkymalarky

Regular EF Member
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Is each PIR going to be able to switch the entire 20 light fittings at one time? Be a shame to wire the PIR's correctly for them to burn the place down.
 
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N

nabba

Thanks again, I think at the moment it's going to be 600x600 square fluorescents placed into a new office refurb grid ceiling ,... Not sure what the wattage is on each one yet as drawings not arrived ...
 
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N

nabba

Will this depend on the rating of the sensor, is that what your explaining ?
 

i=p/u

Electrician's Arms
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you do need to know the load.............. to condier zs value and vd... you could break the room up say first 10m the lights come on walk a little further and the next set come on
 
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